Fatal error on user list

Fatal error: Uncaught TypeError: Return value of TwoFAS\Light\Hooks\Add_Custom_Column_Filter::manage_users_custom_column() must be of the type string, null returned in /home2/gtourquu/public_html/wp-content/plugins/2fas-light/src/Hooks/Add_Custom_Column_Filter.php:87 Stack trace: #0 /home2/gtourquu/public_html/wp-includes/class-wp-hook.php(287): TwoFAS\Light\Hooks\Add_Custom_Column_Filter->manage_users_custom_column(NULL, ‘package’, 5) #1 /home2/gtourquu/public_html/wp-includes/plugin.php(212): WP_Hook->apply_filters(NULL, Array) #2 /home2/gtourquu/public_html/wp-admin/includes/class-wp-users-list-table.php(582): apply_filters(‘manage_users_cu…’, ”, ‘package’, 5) #3 /home2/gtourquu/public_html/wp-admin/includes/class-wp-users-list-table.php(398): WP_Users_List_Table->single_row(Object(WP_User), ”, ”, 0) #4 /home2/gtourquu/public_html/wp-admin/includes/class-wp-list-table.php(1351): WP_Users_List_Table->display_rows() #5 /home2/gtourquu/public_html/wp-admin/includes/class-wp-list-table.php(1278): WP_List_Table->displa in /home2/gtourquu/public_html/wp-content/plugins/2fas-light/src/Hooks/Add_Custom_Column_Filter.php on line 87
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